Please check it out, now am able to work with android programming ?
Yes, assuming you have installed the skd's and java correctly you should be able to write code, debug, and run it on an emulator or your device.
Yes I have installed any thing, Is there any demo or any web page where from I can get idea how to develop my first app ?
IF, Yes, then please do share with me otherwise give me idea how can I develop my first app ?
Which language should I use, Java, HTML, C/C++, which ?
For Android apps: Java (for the most part).
Also, see these wonderful links--especially the training and samples links:
Best of luck!
Could XML be used in Android programming ?
Separate names with a comma.